Abstract: A unitary construction device for temporarily attaching an object to a support of generally elongate shape along a reference axis, has a first part attached to the support and a second part attached to the object and joined to the first part by a coupling portion flexible in bending. This coupling portion includes a pair of identical axial tangs aligned on a first line transverse to the reference axis and coplanar therewith, flexible parallel to a second line transverse to the reference axis and perpendicular to the first transverse line, and requiring the same energy to fracture in tension parallel to the axis. The coupling portion further includes at least one pair of first feet attached to the first part, one on each side of the first transverse line and extending axially towards the second part, and at least one pair of second feet attached to the second part and extending axially towards the pair of first feet and separated therefrom by the same predetermined axial distance.

Abstract: A device for temporarily attaching an object to a support having a body designed to be fixed to the support and including an annular end portion fixed to the object and joined to the body by a coupling characterized in that the coupling between the annular end portion (3) of the receptacle fixed to the object and the body is flexible and fragile. An intermediate ring is joined to the annular end area and to the body by respective pairs of flexible axial tangs on respective diameters at 90.degree. to each other, the tangs of each pair being identical.

Abstract: A mechanisms for temporarily attaching an object to a support, separating and ejecting the object, includes a receptacle adapted to be fixed to the support in which an ejector rod is slidably mounted. The ejector rod has a rear portion acted on by an ejection pressure and a front end bearing against a bearing surface near the center of mass of the object, at the end of an elongate recess into which the ejector rod extends to as far as the bearing surface. The body has an annular end portion which is joined to the body by a fragile coupling. The object is provided with a front central centering area at the bottom of the recess, into which extends, with at most a small clearance, the free end of the ejector rod and a rear end centering area situated near the mouth of the recess, into which extends, with small clearance, a rear centering male portion fastened to the body of the receptacle.